If your Subaru Outback cranks slowly or will not start, the 12-volt battery is usually the cause. Most Outbacks use a Group 25 battery, a slightly smaller domestic-style case. Here is the group size, cost, and replacement guide.
| Model / Years | Group size | Typical CCA | Part cost |
|---|---|---|---|
| Outback 2015-2025 | Group 25 | 550-600 CCA | $140-$240 |
| Outback 2010-2014 | Group 25 | 525-600 CCA | $140-$230 |
| Outback older | Group 25 or 35 | 525-600 CCA | $140-$230 |
The Subaru Outback typically uses a Group 25 battery across most model years. This compact case is common on Subaru and some Nissan models. Confirm the fit by checking your existing battery, since some years and trims may vary.
Around 550 to 600 cold cranking amps is appropriate for the boxer engine and all-wheel-drive electrical load.
A Group 25 battery typically costs about 140 to 240 dollars for the part. With shop installation, budget roughly 180 to 300 dollars. Many parts stores install this accessible battery for free.
With the car off, disconnect the negative terminal first, then the positive. Remove the hold-down bracket, lift out the old battery, and set the new one in the same orientation.
Reconnect positive first, then negative, secure the hold-down, and reset the clock. Some Subaru models with newer electronics benefit from keeping memory power during the swap, but it is not required.
Watch for slow cranking, dim lights, a clicking sound at start, and dashboard warning lights. Subarus with lots of electronics can throw multiple odd warnings when the battery is weak, which usually clear once a good battery is installed.
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